India, Feb. 25 -- The toll from alleged consumption of adulterated milk at Rajamahendravaram in Andhra Pradesh's East Godavari district has risen to six with the death of two more people, officials said, adding preliminary investigation indicated that leakage of coolant gas in a milk-chilling unit of the private firm led to the contamination.

A six-year-old boy and a 58-year-old woman, undergoing treatment, died on Tuesday morning, state health commissioner G Veerapandian said. He added that at least seven others are said to be in critical condition.

Veerapandian said forensic teams collected milk samples for examination and preliminary assessments suggest that the coolant leakage may have contaminated the milk. He added the exact cause...